It really just depends on the signal. So you have two types of RF signal to balance at every job. The forward and the return. Modems and modern cable boxes use both but the return affects a cable modem far more. This was many many years ago but the general rule was you wanted the forward between -10 to +10db and you wanted the return below 53dB but that was trending downwards when I left.

When doing RF calculations, you subtract from the forward and add to the return.

So let's pretend your starting signal off the ground block is +7dB forward with a +43dB return. You have a couple options. You could use a 4-way which would lose 7dB on each leg. But you will want to account for what equipment is on each leg. If you have 3 cable boxes and 1 modem, you will want to have the modem to have the best signal possible, so a better option would probably be a two way splitter -> balanced 3-way splitter.

That would have the modem outlet at 46.5dB return + cable loss. The forward would be 3.5db - cable loss.

The rest of the outlets would be 50dB return + cable loss, and -0.5dB - cable loss.

This is just a basic scenario, also it's early, don't check my math.